Engine-CodesGMC – P25C9 2017 GMC Sierra

P25C9 2017 GMC Sierra Code - Brake System Control Module 2 Requested MIL Illumination

Quick Answer

The P25C9 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Brake System Control Module 2 Requested Malfunction Indicator Lamp (MIL) Illumination. Common causes include Faulty brake system control module, Wiring or connection issues between the control module and other brake system components, Malfunctioning brake pressure sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P25C9 2017 GMC Sierra indicates Brake System Control Module 2 Requested MIL Illumination.
Common causes
Common causes include Faulty brake system control module, Wiring or connection issues between the control module and other brake system components, Malfunctioning brake pressure sensor.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P25C9 2017 GMC Sierra Description

The P25C9 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Brake System Control Module 2 Requested Malfunction Indicator Lamp (MIL) Illumination. This code indicates that the control module responsible for managing the vehicle's brake system has detected a fault that requires the illumination of the MIL (check engine light) on the dashboard. The brake system control module plays a crucial role in monitoring and controlling the various components of the braking system, such as the anti-lock brake system (ABS), traction control system (TCS), and electronic stability control (ESC). When this module detects an issue that could affect the performance or safety of the braking system, it triggers the MIL to alert the driver.

OBDII Code P25C9 2017 GMC Sierra - Brake System Control Module 2 Requested MIL Illumination
P25C9 2017 GMC Sierra Code - Brake System Control Module 2 Requested MIL Illumination

Common Causes of P25C9 2017 GMC Sierra

  1. Faulty brake system control module.
  2. Wiring or connection issues between the control module and other brake system components.
  3. Malfunctioning brake pressure sensor.
  4. Corrosion or damage to the brake system components.
  5. Software or programming errors in the control module.

Symptoms of P25C9 2017 GMC Sierra

  1. Illumination of the check engine light on the dashboard.
  2. Decreased braking performance or responsiveness.
  3. ABS, TCS, or ESC warning lights may also illuminate.
  4. Unusual noises or vibrations when applying the brakes.
  5. Difficulty in engaging or disengaging the parking brake.

How to Fix P25C9 2017 GMC Sierra

  1. Begin by performing a comprehensive diagnostic scan to confirm the exact cause of the issue.
  2. Inspect the wiring and connections related to the brake system control module for any signs of damage or corrosion.
  3. Test the brake pressure sensor to determine if it is functioning correctly.
  4. If necessary, replace the faulty brake system control module or repair any damaged components.
  5. Clear the DTC and reset the MIL to ensure that the issue has been resolved.

Cost to Fix P25C9 2017 GMC Sierra

The typical repair cost for addressing a P25C9 DTC on a 2017 GMC Sierra can range from $200 to $600, depending on the specific cause of the issue and the cost of replacement parts. Keep in mind that labor rates vary between different auto repair shops, so it is advisable to inquire about local rates to get a more accurate estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P25C9 2017 GMC Sierra Code

1. What does the OBDII code P25C9 on a 2017 GMC Sierra indicate?

The code P25C9 specifically refers to "Brake System Control Module 2 Requested MIL Illumination" in the GMC Sierra's diagnostics.

2. What are common symptoms associated with the P25C9 code in a 2017 GMC Sierra?

Common symptoms include the illumination of the Malfunction Indicator Lamp (MIL) or Check Engine Light on the dashboard.

3. What are potential causes of the P25C9 code on a 2017 GMC Sierra?

Possible causes may include issues with the brake system control module, wiring or connection problems, software issues, or a malfunction within the control module itself.

4. How serious is the P25C9 code in a 2017 GMC Sierra?

While the code itself might not cause immediate safety concerns, it is essential to address the underlying issue promptly to ensure proper functioning of the brake system.

5. Can I continue driving my 2017 GMC Sierra with the P25C9 code present?

It is recommended to have the vehicle inspected and repaired as soon as possible to prevent any potential safety risks or further damage to the brake system.

6. How can I diagnose the P25C9 code in my 2017 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code and then conducting further testing to pinpoint the exact cause of the issue.

7. What are some DIY repair tips for the P25C9 code on a 2017 GMC Sierra?

DIY repair may involve checking and securing wiring connections, inspecting the brake system control module for visible damage, or updating software if applicable.

8. Is it recommended to reset the P25C9 code in a 2017 GMC Sierra after repairs?

After addressing the underlying issue, it is advisable to clear the code using an OBDII scanner to reset the Check Engine Light and ensure the repair was successful.

9. Are there any recalls or technical service bulletins related to the P25C9 code in a 2017 GMC Sierra?

It is recommended to check with a GMC dealership or online resources for any relevant recalls or technical service bulletins related to this specific diagnostic trouble code.

10. How much can I expect to pay to repair the P25C9 code on a 2017 GMC Sierra?

Repair costs can vary depending on the exact cause of the issue, but it is recommended to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

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